One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,14)(13,16)(18,23)(19,28)(20,24)(21,29)(25,30)(31,32) involution — undirected(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,18)(19,20)(21,26)(22,23)(24,25)(27,29)(28,32)(30,31) involution — undirected(10,14)(11,16)(17,19,29,25,22,30,21,28)(18,24,26,20,23,32,27,31)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,20,21,24,22,31,29,32)(18,25,27,19,23,28,26,30)(2,5)(6,8)(10,14)(13,15)(17,21,22,29)(18,26,23,27)(19,25,30,28)(20,24,31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.